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Thread: New seedlings & MH lighting

  1. #16
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    Re: New seedlings & MH lighting

    A Watt is a Watt whether it's from a CFL or HID. An HID will seem hotter as it radiates heat in a more concentrated fashion, whereas CFLs radiate their heat over a larger surface area.

  2. #17
    420 Member Dr Fish's Avatar
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    Re: New seedlings & MH lighting

    Stick your thermometer in the base of the cfl bulb, in the holes where it vents heat... Better yet, turn it off and try to unscrew it barehanded.... Watt for watt, they're all about the same when it comes to the light/heat ratio per watt... The best led chips are at the top of the heap now....
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  3. #18
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    Re: New seedlings & MH lighting

    Any input on HiGrow LED grow lights? I'm pretty set on ordering their 600 watt setup.

  4. #19
    420 Member Dr Fish's Avatar
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    Re: New seedlings & MH lighting

    It's your typical misrepresentation... Claiming a 250 watt draw led will replace a 600 watt hps.... It's a 250 watt, low priced led light... It may be able to replace a 250 watt hps.... Maybe..
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  5. #20
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    Re: New seedlings & MH lighting

    So stick with something like Mars hydro is what you're saying?

  6. #21
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    Re: New seedlings & MH lighting

    Just to clear up a misconception.... When the Mfg rates a fixture or lamp at a specific wattage, they are referring to the amount of consumption of the electricity that the unit will use. A 250 CFL and a 250W MH both have the same amount of current and voltage consumption totaling roughly 250 watt, and it has nothing whatsoever to do with the output of the light in terms of flux, lumens PAR or whatever method you chose to measure the amount of light generated. It also has very little to do with the heat it generates.

    If a CFL is rated at 250W, it has a rate of efficiency and will generate lumens, (Lux whatever)

    Likewise the 250W MH fixture has an efficiency rate for generating the Lumens.

    The heat generated is a byproduct of the production of the photons (Lumens) and is not related to the wattage rating of the fixture. It can be said that the wattage of the fixture or lamp is a good indication of how hot it will get, but it is not a reliable indicator, as compared earlier in the thread between MH and CFL.

    That being said, I've been building my own LED fixtures, and still use the wattage rating of LED @ 12V like it is compared to a 120volt setup, and really, even I am mistaken in this using this as a measure of lighting ability. Its just an old habit.

    I've literally installed and repaired hundreds of LED light fixures and over the course of my life as industrial electrician have probably installed several thousand MH/HPS lights..

    I'm purchasing a Luxmeter shortly after I do some more research on it so I can do the metric conversions in my head and then I'll be able to get a better comparison and accuracy of the differences between MH/HPS and LED.. ( I'm old, still use imperial most of the time)

    Just my 2 cents trying to be helpful..
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